Damascene Philosophy

Thought ExperimentsXXII

Would you live your life again, forever?

A demon tells you that you will live this exact life again, every moment, infinitely many times. Would you curse him, or call it the most divine thing you ever heard?

Reading time
4 min
Difficulty
Intermediate
Branch
Meaning
First posed
Friedrich Nietzsche, The Gay Science, §341, 1882
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Every moment, the same, in the same order, again and again, forever.

The setup

In The Gay Science (1882), Friedrich Nietzsche asks you to imagine a scene. One day or night, a demon creeps after you into your loneliest loneliness and tells you something. The life you are living now, and have lived, you will have to live again, and then again, innumerable times. Nothing new will ever be added. Every pain and every joy, every thought and sigh, everything small and great in your life, will return to you in exactly the same order.

Every moment, exactly as it was. The same mistakes, the same heartbreaks, the same small mornings. Not a better version, not a lesson learned: the identical life, again and again, forever.

Nietzsche asks how you would respond. Would you throw yourself down, grind your teeth and curse the demon? Or have you ever known a moment so tremendous that you would answer: you are a god, and I have never heard anything more divine?

Why it matters

The eternal recurrence is Nietzsche's test of how you stand toward your own life. If the thought fills you with horror, there is something in how you are living that you do not truly affirm. If you could welcome it, you have achieved what Nietzsche called amor fati: love of fate, wanting nothing to be different.

It is a thought experiment that turns inward. It does not ask what is true about the world, but how you would have to live for this thought to be a blessing rather than a curse.

Key terms

  • Eternal recurrenceThe idea that time is cyclical and every moment will repeat infinitely many times. Nietzsche used it mainly as a test of how fully one can affirm one's life.
  • Amor fatiLatin for 'love of fate'. Nietzsche's ideal of wanting nothing to be different, not merely bearing what happens but loving it.
  • NihilismThe view that life has no meaning or that there are no real values. In ethics, it can mean the denial that anything is truly right or wrong.
  • ÜbermenschNietzsche's 'overhuman' or 'superman': an ideal of a person who creates their own values and affirms life completely.
  • Affirmation (of life)In Nietzsche, saying yes to one's life as a whole, including its suffering, so completely that one would will it to recur exactly as it was.

The positions

Position I

A test of affirmation

The recurrence is a thought experiment, not a cosmology. Its point is to ask whether you can affirm your life so completely that you would will it again, exactly as it is.

Position II

A claim about the cosmos

Nietzsche sometimes presented the recurrence as literally true: in infinite time, a finite universe must repeat every configuration.

Position III

Recurrence would make nothing matter

If every moment repeats forever, no choice can make a difference, and the idea leads to fatalism or despair.

Arguments and objections

A test of affirmation

Best argument
Nietzsche presents it hypothetically, as a 'what if'. Asking yourself, before every act, whether you would want it again innumerable times would, he wrote, lie on your actions as the greatest weight. Most scholars today read it as an ethical or existential test: live so that you could will every moment to return. This reading does not require believing anything about physics.
Strongest objection
If it is only a thought experiment, why should it have any force? Someone could simply say they would hate to repeat their life, and continue as before.
The reply
Nietzsche's point is that the reaction itself is revealing. Horror at the thought diagnoses a life lived in resentment, waiting for some other life to begin. The test is meant to provoke change, not settle a fact.

A claim about the cosmos

Best argument
In unpublished notes, Nietzsche sketched an argument: if the amount of energy in the universe is finite, and time is infinite, then every combination of states must recur infinitely often. Similar ideas appear in ancient Stoic cosmology, which held that the universe periodically ends in fire and is reborn identically.
Strongest objection
The argument does not work as stated. A finite system can avoid repeating forever, for example by following a non-periodic pattern. Modern physics, with an expanding universe and increasing entropy, gives no clear support for exact recurrence. See Boltzmann brains.

Recurrence would make nothing matter

Best argument
Milan Kundera began The Unbearable Lightness of Being by reflecting on the eternal return as the heaviest of burdens, and contrasted it with the lightness of a life that happens only once and so seems hardly to count at all. Both options are troubling.
Strongest objection
Nietzsche's point was not that recurrence makes choices meaningless, but that it gives every choice infinite weight. If this moment returns forever, how you live it matters enormously.

Who argued what

  • A test of affirmation Friedrich Nietzsche, Bernard Reginster, Alexander Nehamas
  • A claim about the cosmos nietzsche (notebooks), The ancient Stoics
  • Recurrence would make nothing matter Milan Kundera, Arthur Schopenhauer

Variations

Your worst day

Take the worst day of your life. To affirm the eternal recurrence, you must will that day too, again and again. Nietzsche's answer was that the bad days are inseparable from everything you value; to want your life is to want all of it. Can you?

Groundhog Day

In the 1993 film Groundhog Day, a man relives the same day over and over. Unlike Nietzsche's recurrence, he remembers each repetition and can change his choices. He eventually breaks the cycle by becoming a better person. Nietzsche's version is harsher: no memory, no improvement, no escape.

Go deeper

The greatest weight

The section in The Gay Science is titled 'The greatest weight' (das grösste Schwergewicht). Nietzsche later called the eternal recurrence 'the fundamental conception' of Thus Spoke Zarathustra (1883 to 1885), where Zarathustra struggles for most of the book to face and accept it. The idea was, for Nietzsche, inseparable from overcoming nihilism: affirming life fully, without needing a heaven, a purpose or a reason outside it.

Schools of thought: Existentialism, Stoicism

Related ideas

Question

Does life have meaning without being given one?

If no one designed us for a purpose, is a human life meaningful anyway, or do we have to make meaning ourselves, or is the search itself the problem?

Thought experiment

Must we imagine Sisyphus happy?

Condemned by the gods to roll a boulder uphill forever, only to watch it roll back down. Camus saw in him an image of every human life, and concluded that he could be happy.

Question

Are you born with a nature?

A knife is made for cutting before it exists. Sartre argued that people are the reverse: we exist first, and only then decide what we are.

Question

Is time real?

Time feels like a river carrying us from past to future. Physics describes it more like a map, with no moving 'now' anywhere on it.

Question

Should we fear death?

Epicurus argued that death is nothing to us: when it comes, we are gone. Few have found the argument convincing, and fewer have refuted it.

Question

Should you only care about what you control?

The Stoics divided the world into what is up to you and what is not, and argued that peace comes from caring only about the first.

Further reading and sources

Open questions

  • Which moments of your life would you gladly live again, forever?
  • What would you change about how you live if every choice returned eternally?
  • Is it possible to love a life that includes great suffering?

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